Primary memory, also known as main memory, is crucial for a computer's operation, as it temporarily holds data and instructions currently in use, but it has a limited capacity and is volatile. It comprises two main types: RAM, which is faster and allows read/write operations but loses data when powered off, and ROM, which is non-volatile and used for permanent storage of essential programs and data. Various RAM types exist, including SRAM, DRAM, while ROM includes PROM, EPROM, and EEPROM.

1. PRIMARY MEMORY
(MAIN MEMORY)
PRIMARY MEMORY
(MAIN MEMORY)

2. GROUP MEMBERS ARE:
●
ACHARYA JAY ●
GOHIL CHIRAG

3. PRIMARY MEMORY
➢
PRIMARY MEMORY HOLDS ONLY THOSE DATA AND
INSTRUCTIONS ON WHICH THE COMPUTER IS
CURRENTLY WORKING. IT HAS A LIMITED CAPACITY
AND DATA IS LOST WHEN POWER IS SWITCHED OFF.
➢
IT IS GENERALLY MADE US SEMICONDUCTOR DEVICE.
➢
THESE MEMORIES ARE NOT AS FAST AS REGISTERS.
➢
IT IS DIVIDED INTO TWO SUBCATEGORIES RAM AND
ROM.

4. PRIMARY MEMORY
➢
THESE ARE SEMICONDUCTOR MEMORIES.
➢
IT IS KNOWN AS THE MAIN MEMORY.
➢
USUALLY VOLATILE MEMORY.
➢
DATA LOST IN CASE POWER IS SWITCHED OFF.
➢
IT IS THE WORKING MEMORY OF THE COMPUTER.
➢
FASTER THAN SECONDARY MEMORIES.
➢
A COMPUTER CANNOT RUN WITHOUT THE PRIMARY MEMORY.

5. PRIMARY MEMORY
RAM
➢ ALTERNATIVELY REFERRED TO AS MAIN MEMORY, PRIMARY MEMORY OR
SYSTEM MEMORY.
➢ RAM IS HARDWARE DEVISE THAT ALLOWS INFORMATION TO BE STORED AND
RETRIEVED ON A COMPUTER.
➢ THE COMPUTER CAN ACCESS THE DATA MUCH FASTER.
➢ RAM IS VOLATILE MEMORY AND REQUIRES POWER TO KEEP THE DATA
ACCESSIBLE.
➢ IF THE COMPUTER IS TURNED OFF, ALL DATA CONTAINED IN RAM IS LOST.

6. PRIMARY MEMORY
ROM
➢
ROM IS USED FOR STORING PROGRAMS AND DATA PERMANENTLY.
➢
THE DATA AND PROGRAMS REQUIRED FOR SOME APPLICATIONS
ARE PERMANENTLY STORE IN THE ROM CHIP.
➢
THUS A USER MAY READ A PROGRAM OR DATA FROM ROM BUT
MAY NOT WRITE ON ROM.

7. PRIMARY MEMORY
➢
RAM:-RANDOM ACCESS MEMORY
➢
SRAM:-STATIC RANDOM ACCESS MEMORY
➢
DRAM:-DYNAMIC RANDOM ACCESS MEMORY
➢
ROM:-READ ONLY MEMORY
➢
PROM:-PROGRAMMABLE READ ONLY MEMORY
➢
EPROM:-ERASABLE PROGRAMMABLE READ ONLY MEMORY
➢
EEPROM:-ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY

8. THANK YOU